Chronic intraaneurysmal pressure measurement: An experimental method for evaluating the effectiveness of endovascular aortic aneurysm exclusion

Abstract

Aneurysm exclusion with PTFE-EG significantly lowered IAP, did so significantly better than the TD-EG, and approached the IAP reduction obtained by standard repair. Such pressure reduction is necessary for effective protection against aneurysm rupture.

Increasing Incidence of Midterm and Long-Term Complications After Endovascular Graft Repair of Abdominal Aortic Aneurysms: A Note of Caution Based on a 9-Year Experience

“…24 Thus, inducing thrombosis in this circumstance may lead to a successful outcome. 7,15,24,30,32,33 In contrast, short endoleak channels with a wide diameter will require covering of the feeding orifice with graft material to obliterate pressure transmission. Thus, although the type of endoleak influences the method of treatment, we believe that the treatment method should also be determined by the length and diameter of the endoleak channel, and we applied this concept in the treatment of endoleaks in the latter part of the current study (see Fig.…”

Aortic aneurysm sac pressure measurements after endovascular repair using an implantable remote sensor: initial experience and short-term follow-up

“…Patient-related factors include patent side branches, thrombus composition, and aneurysm configuration [7][8][9]. Graft-related issues are porosity, compliance, and pulsatility [10].…”

Endotension following endovascular aneurysm repair

“…19 As mentioned above, we first demonstrated increased intrasac pressure in the absence of endoleak in dogs, for which EVAR was performed using PTFE or Dacron (Coknit) graft with high porosity. Despite an increase in intrasac pressure with Dacron graft, endoleak was not detected by angiography and contrast CT. 2 Although graft material has been postulated to be responsible for the local production and transmigration of serous fluid and sac hygroma after EVAR and open AAA surgery, the relationship between the material of graft or prosthesis and the incidence of aneurysm sac enlargement remains unclear. In an experimental model, a PTFE graft has been shown to reduce sac pressure more effectively than Dacron graft.…”

“…Before the clinical significance of endotension in sac enlargement after EVAR was established, we had observed increased intrasac pressure in the absence of endoleak in a canine model -although we did not term it endotension. 2 White and colleagues 3 defined endotension as a phenomenon in which postoperative high intrasac pressure occurs in the absence of continuous perfusion of the aneurysm sac. This persistent pressure may lead to enlargement of the sac, and was termed endotension or unclassified type V endoleak.…”